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问题: 几道单选~

1.He worked through his college,so he had____better understanding of___life
A.a;the B.the;a C.\;the D.a;\

2.Every means____,but none proved____.
A.have tried;a success
B.have been tried;successful
C.has tried;to be successful
D.has been tried;successful

解答:

两道题都选D
第一题understanding of前加a 表示“对...的理解”
life是抽象名词前面不加冠词
第二题 means 是单数名词“方法”后用单数has
因为是“被尝试”所以用被动
proved是系词后面直接加形容词successful